Leonardo Magne

Find out in my Fanfiction “Rise of the Dark Lord: Heir of Slytherin and Odin” on Wattpad/FF/AO3 where Grindelwald had a Vision that Dumbledore would stop him in March 1927 but the Vision also showed him that if he fathered a Child then it would continue his Work.

So he sired in Secret a Son with his most trusted and devoted Follower and right hand Woman Vinda Rosier whose real Name was none other than Merope Gaunt one of the last living Heirs of Salazar Slytherin who ran away from Little Hangilton at the Age of 16 to escape from her Brother and Father’s Pureblood Mania, who planned to marry her to her own Brother Morfin in his Madness to keep the Slytherin bloodline pure.

She went on to live with her Uncle Loui Rosier under a new name Vinda Rosier.

After giving birth on the 31st December of 1927 in Nurmengard Merope is ordered to once the Child does no longer require Maternal Milk to hide the new Heir of the Grindelwald & Gaunt Families away from the Wizarding World. Merope does so by taking the Baby once he’s 8 months old to London and hiding her boy in a Muggle Orphanage where she registers him under the Name Tom Marvolo Riddle.

The first Name belonged to her only Friend in Little Hangilton a young handsome Aristocrat named Tom Riddle and the Second to her Father Marvolo. Merope gave her Son those Names one out of respect for her Father, who before he had lost everything due to his Gambling Addiction treated her nicely and the other two out of Nostalgia and missing her only Friend in her sad Adolescence.

Even though she would never openly admit it she had loved the Muggle Boy and even revealed to him what she was after their first Kiss. Part of her wished he was her Son’s Father for she knew that Gellert did not love her despite her deep commitment to him and his noble Cause and the Night of Passion they shared in Paris.

He sired a Son with her simply out of necessity so that he could one way or another continue his great Work for the greater Good in case he might fail.

So she would now also for the greater Good abandon her Son in an Muggle Orphanage with nothing so that he could grow up alone but forged in Strength to carry on his Father’s Work in case he failed. If not and they succeeded then she or Lord Grindelwald himself would one day come for him to reveal him the truth of his Great Heritage and Bloodline and take him home. She implants false Memories on the Muggles of the Orphanage of her being a sickly deformed Woman who gave birth in the Orphanage in the Winter of 1927 and then died before returning to her Master. It was the right thing to do.